Four letters from Helen Tangney-Springer, Manager of the Wahkonsa Hotel, Fort Dodge, Iowa to Paul A. Douden & Company, dated November 13, 1937. Mentioned in the letter is the use of Scale Buoys in the coffee urns and the hot water tank and the difference in the cleaning of them.Letterhead - Tangney Hotelssciences, instruments - general, scalebuoy, bill ashman collection - correspondence, e c tangney, helen tangney, h h mueller, e j tangney, tangney hotels, wahkonsa hotel, muscatine hotel, arlington hotel, burke hotel, paul a douden & company, helen tangney-springer

Five copies of a letter to Paul A. Douden & Company from W. E. Humphrey, Chief Engineer, dated November 12, 1937. Paper has printed letterhead with a photo of the rubber company at the top. Writer mentions that they are pleased with the work of the Scale Buoys and that there is no scale in the pipes. Previously they had to replace piping regularly.sciences, instruments - general, scalebuoy, bill ashman collection - pennsylvania rubber company, paul a douden & company, w e humphrey

Five copies of a letter from ? Smith, Engineer Way & Structures, of the Kansas City Public Service Company to Paul A. Douden & Co., dated November 15, 1937. He tells of their experiences with Scalebuoys. He mentions reduction of scale and about a 30% reduction in the consumption of soap and the chemicals used in the water for cleaning purposes. In the bottom left corner is a small picture of a bus and a tram.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, kansas city public service company, paul a douden & co, ? smith

Seven copies of a letter from W. W. Eden, Mgr., F. W. Woolworth Co., dated November 12,1937 to Paul A. Douden & Co. He mentions that since installing the Scalebuoys over two years ago they have had no trouble with scale in the water systems where the Scale buoys were installed and they are contemplating installing in the water they used for cooling their natural gas engines. Since installing the scalebuoys there has been considerable savings on soap powders.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, f w woolworth co, paul a douden & co, w w eden

Letter dated November 12, 1937 to Paul A. Douden & Co. from W. W. Eden, Mgr. F. W. Woolworth Co. W. W. Eden mentions that since installing Scale Buoys over two years age we have had no trouble from scale or lime deposits at all in our system, except for the water used for cooling the natural gas engines. This water didn't come in contact with the Scale Buoys and they contemplated additional units to treat it. They also had no scale in the coffee makers and dish washers.sciences, instruments - general, scalebuoy, bill ashman collection, f w woolworth co, paul a douden & co, scale buoys, w w eden

Dull orange folder containing copies of letters, brochures, information sheets and some newspaper cuttings. Name on the front is Frank A. Stevenson 244 Hargreaves St Bendigo. Letters date from 1937 to 1942. Newspaper titles include: Prevention of Rust- Principle of the Scalebuoy, Scalebuoys in Cars, Tragic Death of Captain Hartley Abbott and the Obituary of Captain R.H.S.Abbott.sciences, instruments - general, scalebuoy, bill ashman collection - correspondence, frank a stevenson, mr bacon, amalgamated freezing co bendigo, g whalley, gunbower co-operative butter factory & trading coy ltd, mr wallace, j charlesworth, d v evershed, bendigo electronic co, walshes crown hotel, hunter bros, wybgones unit, 180 gold mining co, o'hallorans cyanide unit, crystal ice works, stevenson unit, bendigo council, central nell gwynne, nth deborugh g m co, deborugh g m c, deborugh consolidated, cohuna butter factory, geo ross, victorian producers' co-operative coy ltd, h abbott, ernest f o liddell, rothacker bros, motor spares ltd, leggo's buildings, t j jorgensen, mr robinson, stevenson bros, r h s abbott, d c house, the electrical factor in metabolism, w n abbott, the great boulder proprietary gold mines ltd, w o galletly, mr stronell, newport workshops, victorian railways, mr brownbill, mr james, the university of melbourne, j l osborne, n clarkson, sister mary gonzaga, st joseph's hospital, mater misericordiae hospital, mr herzog, sister m monica?, vacuum oil, j johns, h j grigg, w a walsh, market square, crown hotel, g e cole, transport & engineering in australia 16/12/1937, mr menderson, mr ross, sanitary age 8/2/1935, northern kiwanis clubs, harry a baxter, w h cunningham & hill ltd, link-belt co ltd, sir william crooks, royal zoological society, ginna works germany, close brothers, w h taylor, geo taylor hardware co ltd, details of hydraulic spinner unit (scalebuoy), a davidson, john g kelly inc, hannon, myers wishart, kennedy, mr critten, pennsylvania rubber coy, paul a douden & co, w e humphrey, kansas city public service co, smith, tangney hotels, wahkonsa hotel, muscatine hotel, arlington hotel, burke hotel, helen tangney-springer, f w woolworth co, w w edan, ymca, n f alcock, b j ingram, scalebuoys, bendigo electronic company of australia proprietary limited, a s bloomfield, harry ponsonby mackenzie, arthur robinson & co, the commercial banking company of sydney ltd, a t madden, victorian railways, e c eyers, city of bendigo, frank h day, lane's motors pty ltd, h c holland, union oil soap & candle co ltd, knox home, n a duthie, w h mccorkindale, maungatapere co-op dairy co ltd, the whangarei co-op dairy co ltd, w h millingford, kettering cartons limited, j g arlidge, w e humphrey, kansas city public service company, h w smith, prospectus of scale buoy distributors limited, edwin gripper banks, richard hartley smith abbott, frank shaw fitchett, hayden smith & fitchett, the commercial bank of australia limited, william john stanley horsfall, frank cooper, scott's hotel, a j phillips, stringer & phillips proprietary ltd, e g banks, edwin gripper banks, reginald william stringer, frank cooper, claude gordon robinson, s reid

Cream booklet with brown printing titled Bendigo Electronic Company of Australia Proprietary Limited. Includes Capital, number of Shares, Directors, Solicitors, Bankers Registered Office, Copy of a letter re Patents, Information about Scalebuoys, Users of Scalebuoys, What Scalebuoys Do and Where they are used, Also copies of letters from the Victorian Railways, City Overseer Bendigo, Lane's Motors Pty Ltd Melbourne, Union Oil, Soap & Candle Co. Ltd NZ, Knox Home NZ, Maungatapere Co-Op Dairy Co. Ltd., Whangarei Co-operative Dairy Company Ltd. NZ, Kettering Cartons Limited England, Pennsylvania Rubber Company USA, and the Kansas City Public Service Company USAsciences, instruments - general, scalebuoy, bill ashman collection - correspondence, bendigo electronic company of australia pty ltd, a s bloomfield, r h s abbott jnr, harry ponsonby mackenzie rn (retd), arthur robinson & co, the commercial banking company of sydney limited melbourne, a t madden, h a abbott, e c eyers, frank stevenson, city of bendigo, frank h day, lane's motors pty ltd, h c holland, national mutual chambers (n.z.) ltd, union oil soap & candle co ltd, knox home, n a duthie, w h mccorkindale, maungatapere co-op dairy co ltd, j stevenson, the whangarei co-op dairy company ltd, w h millingford, kettering cartons limited, j g arlidge, pennsylvania rubber company, paul a douden & company, w e humphrey, kansas city public service company, h w smith, j t picken & sons